21381872

素因数分解:

$2^4\times {\mathrm{311}}^1\times {\mathrm{4297}}^1$

素因数の和:4616

約数の個数: 20

約数和(自身を含む): 41570256

約数和(自身を除く): 20188384

約数列:

[1, 2, 4, 8, 16, 311, 622, 1244, 2488, 4297, 4976, 8594, 17188, 34376, 68752, 1336367, 2672734, 5345468, 10690936, 21381872]

約数ペア:

[(1, 21381872), (2, 10690936), (4, 5345468), (8, 2672734), (16, 1336367), (311, 68752), (622, 34376), (1244, 17188), (2488, 8594), (4297, 4976)]